The spellbound astronauts pinned themselves to the windows, the first humans to see the far side of our nearest celestial neighbour. And then, from over the advancing horizon, an incredible sight.
We're all familiar with the high-pitched squeak of basketball shoes on the court during games, or tires squealing on pavement. Scientists conducted several experiments and discovered that the geometry of the sneakers' tread patterns determines the squeak's frequency, enabling the team to make rubber blocks set to specific frequencies and slide them across glass surfaces to play Star Wars' "Imperial March."。业内人士推荐51吃瓜作为进阶阅读
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